1 // { dg-do run }
2 // { dg-additional-options "-pthread" { target pthread } }
3 // { dg-require-effective-target c++11 }
4 // { dg-require-gthreads "" }
5 
6 // Copyright (C) 2009-2021 Free Software Foundation, Inc.
7 //
8 // This file is part of the GNU ISO C++ Library.  This library is free
9 // software; you can redistribute it and/or modify it under the
10 // terms of the GNU General Public License as published by the
11 // Free Software Foundation; either version 3, or (at your option)
12 // any later version.
13 
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 // GNU General Public License for more details.
18 
19 // You should have received a copy of the GNU General Public License along
20 // with this library; see the file COPYING3.  If not see
21 // <http://www.gnu.org/licenses/>.
22 
23 
24 #include <future>
25 #include <testsuite_hooks.h>
26 
test01()27 void test01()
28 {
29   std::promise<int> p1;
30   std::promise<int> p2;
31   p1.set_value(1);
32   p1.swap(p2);
33   auto delay = std::chrono::milliseconds(1);
34   VERIFY( p1.get_future().wait_for(delay) == std::future_status::timeout );
35   VERIFY( p2.get_future().wait_for(delay) == std::future_status::ready );
36 }
37 
main()38 int main()
39 {
40   test01();
41   return 0;
42 }
43